1 ; RUN: opt -instsimplify -S < %s | FileCheck %s 2 3 ; CHECK-LABEL: @test 4 define i1 @test(i8 %p, i8* %pq) { 5 %q = load i8, i8* %pq, !range !0 ; %q is known nonzero; no known bits 6 %1 = or i8 %p, 2 ; %1[1] = 1 7 %2 = and i8 %1, 254 ; %2[0] = 0, %2[1] = 1 8 %A = lshr i8 %2, 1 ; We should know that %A is nonzero. 9 %x = icmp eq i8 %A, 0 10 ; CHECK: ret i1 false 11 ret i1 %x 12 } 13 14 !0 = !{ i8 1, i8 5 } 15
